The (codename ES2) uses a MediaTek MT6750 chipset, which requires a scatter file for flashing via tools like SP Flash Tool . Verified firmware and scatter files are typically available for specific variants, including TA-1049, TA-1057, TA-1063, TA-1070, and TA-1074 . Download Sources for Verified Scatter Files
Power off the Nokia 31 completely (press all buttons for 15 seconds). Click the green button. Now, connect the USB cable to the phone. The progress bar should move to 100% (takes ~3 minutes). nokia 31 scatter file verified